Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cong thanh » dong thanh, cong trinh, truong thanh
hanh tang » hanh trang, anh tang, hanh mang
cua chung » cua nhung, luan chung, luat chung
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong ty

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - hanh tang cua chung ((cong thanh) OR (cong tan)) van ban~".
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - hanh tang cua chung ((cong thanh) OR (cong tan)) van ban*.